package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.properties.BaiduProperties;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.task.WebSocketTask;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    private static final String BAIDU_GEOCODING="https://api.map.baidu.com/geocoding/v3";
    private static final String BAIDU_ROUTING="https://api.map.baidu.com/directionlite/v1/driving";

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private BaiduProperties baiduProperties;
    @Autowired
    private WebSocketServer webSocketServer;


    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional(rollbackFor = Exception.class)
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //判断各种业务异常，并跑出异常提示信息(如地址簿为空或者购物车为空)ps:虽然前端也可以判断，但是为了程序的健壮性，以匹配如postman或者其他端口发来的请求，则可能绕过前端的判断，所以要在后端也要做一份
        //判断地址簿是否为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        //获取当前用户的详细地址
        String userAddress=addressBook.getProvinceName()+addressBook.getCityName()+addressBook.getDistrictName()+addressBook.getDetail();
        //判断是否超过限定距离
//        checkOutOfRange(userAddress);
        //判断当前用户的购物车是否为空
        Long userId = BaseContext.getCurrentId();//获取用户Id
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(userId)
                .build();
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0)
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        //向订单表插入一条数据
        Orders orders = Orders.builder()//插入时初始化的订单状态
                .userId(userId)
                .number(String.valueOf(System.currentTimeMillis()))
                .status(Orders.PENDING_PAYMENT)
                .orderTime(LocalDateTime.now())
                .payStatus(Orders.UN_PAID)
                .phone(addressBook.getPhone())
                .consignee(addressBook.getConsignee())
                .build();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);

        orderMapper.insert(orders);

        //向订单明细表插入n条数据
        List<OrderDetail> list = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            list.add(orderDetail);
        }

        orderDetailMapper.insertBatch(list);

        //清空当前购物车的数据
        shoppingCartMapper.deleteByUserId(userId);

        //封装VO数据并返回
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .orderTime(orders.getOrderTime())
                .orderAmount(orders.getAmount())
                .id(orders.getId())
                .orderNumber(orders.getNumber())
                .build();
        return orderSubmitVO;
    }

    /**
     * 订单支付
     * @param ordersPaymentDTO
     * @return
     */
    @Override
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception{
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        /*JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }*/

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        //为替代微信支付成功后的数据库订单状态更新，多定义一个方法进行修改
        Integer OrderPaidStatus = Orders.PAID; //支付状态，已支付
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;  //订单状态，待接单

        //发现没有将支付时间 check_out属性赋值，所以在这里更新
        LocalDateTime check_out_time = LocalDateTime.now();

        //获取订单号码
        String orderNumber = ordersPaymentDTO.getOrderNumber();

        log.info("调用updateStatus，用于替换微信支付更新数据库状态的问题");
        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, orderNumber);

        //TODO
        //通过websocket向客户端推送消息 type orderId content 另外两项可以配置但没必要，还有一点就是这段代码不应该写在这里，但由于我们跳过了微信支付，所以不可能调用到paysuccess方法，故先写在这里
        Map map=new HashMap();
        map.put("type",1);//1表示来单提醒 2表示客户催单

        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

//        //通过websocket向客户端推送消息 type orderId content
//        Map map=new HashMap();
//        map.put("type",1);//1表示来单提醒 2表示客户催单
//        map.put("orderId",orders.getId());
//        map.put("content","订单号"+outTradeNo);
//
//        String jsonString = JSON.toJSONString(map);
//        webSocketServer.sendToAllClient(jsonString);
    }

    /**
     * 用户端订单分页查询
     *
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult UserpageQuery(int page, int pageSize, Integer status) {
        //开启分页查询
        PageHelper.startPage(page, pageSize);
        //设置动态查询参数
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setStatus(status);
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        //分页条件查询
        Page<Orders> Orderpage = orderMapper.pageQuery(ordersPageQueryDTO);
        //封装返回数据
        List<OrderVO> orderVOList = new ArrayList<>();
        if (Orderpage != null && Orderpage.getTotal() > 0) {
            for (Orders order : Orderpage) {
                Long orderId = order.getId();
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(order, orderVO);//???
                orderVO.setOrderDetailList(orderDetailList);
                orderVOList.add(orderVO);
            }
        }
        long total = Orderpage.getTotal();
        return new PageResult(total, orderVOList);
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        //根据id查询订单
        Orders orders =orderMapper.getById(id);
        // 查询该订单对应的菜品/套餐明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将该订单及其详情封装到OrderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /**
     * 用户取消订单
     * @param id
     */
    @Override
    public void userCancelById(Long id) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //封装一个用于修改数据库数据的orders对象,加快修改速度
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        //订单处于待接单状态时，用户取消订单后需要退款
        if(ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
//            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额
            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 用户再来一单
     * @param id
     */
    @Override
    public void repetition(Long id) {
        //根据id查询订单
        Orders orders =orderMapper.getById(id);
        // 查询该订单对应的菜品/套餐明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        //将该订单对应的菜品/套餐明细插入购物车列表中
        List<ShoppingCart> shoppingCartList = new ArrayList<>();
        for (OrderDetail orderDetail : orderDetailList) {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail, shoppingCart);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCart.setUserId(BaseContext.getCurrentId());
            shoppingCartList.add(shoppingCart);
        }
        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 客户端条件查询
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        //开启分页查询
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        //分页条件查询
        Page<Orders> Orderpage = orderMapper.pageQuery(ordersPageQueryDTO);
        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(Orderpage);
        long total = Orderpage.getTotal();
        return new PageResult(total, orderVOList);
    }

    /**
     * 各个状态的订单数量统计
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        //获得需要返回的三种状态的订单数量
        Integer confirmed = orderMapper.statisticsByStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.statisticsByStatus(Orders.DELIVERY_IN_PROGRESS);
        Integer toBeConfirmed= orderMapper.statisticsByStatus(Orders.TO_BE_CONFIRMED);
        //封装自定义的orderStatisticsVO
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        return orderStatisticsVO;
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());
        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //封装一个用于修改数据库数据的orders对象,加快修改速度
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        //如果用户已经支付，需要退款
        if(ordersDB.getPayStatus().equals(Orders.PAID)){
//            //用户已经支付，调用微信支付退款接口
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额
//            log.info("申请退款,{}",refund);
//支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        //查询支付状态
        Integer payStatus = ordersDB.getPayStatus();
        //用户已经支付，需要退款操作
        if(payStatus.equals(Orders.PAID)){
            //            //用户已经支付，调用微信支付退款接口
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额
//            log.info("申请退款,{}",refund);
//支付状态修改为 退款
        }

        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orders.setPayStatus(Orders.REFUND);
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     */
    @Override
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        // 校验订单是否存在，并且状态为待派送
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     *
     * @param id
     */
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 客户催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null ) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //通过websocket向客户端推送消息 type orderId content
        Map map=new HashMap();
        map.put("type",2);//1表示来单提醒 2表示客户催单
        map.put("orderId",id);
        map.put("content","订单号"+ordersDB.getNumber());

        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }

    /**
     *
     * @param orderpage
     * @return
     */
    private List<OrderVO> getOrderVOList(Page<Orders> orderpage) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();
        List<Orders> orders = orderpage.getResult();
        if(!CollectionUtils.isEmpty(orders)){
            for (Orders order : orders) {
                OrderVO orderVO = new OrderVO();
                // 将共同字段复制到OrderVO
                BeanUtils.copyProperties(order, orderVO);
                String OrderDishs=getOrderDishesStr(order);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(OrderDishs);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     * @param order
     * @return
     */
    private String getOrderDishesStr(Orders order) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(order.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     * 检查客户的收货地址是否超出配送范围
     * 通过百度api接口获得地址的经纬度数据
     * @param address
     */
    private void checkOutOfRange(String address){
        Map<String, String> param=new HashMap<>();
        param.put("address", baiduProperties.getShopAddress());
        param.put("ak",baiduProperties.getAk());
        param.put("output","json");
        //获取店铺的经纬度坐标
        String Shopjson = HttpClientUtil.doGet(BAIDU_GEOCODING, param);
        //读取json数据，获得json对象
        JSONObject jsonObject = JSONObject.parseObject(Shopjson);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }
        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");//维度
        String lng = location.getString("lng");//经度
        String shopLngLat=lat+","+lng;//商铺地址

        param.put("address", address);
        //获取客户的经纬度坐标
        String Userjson = HttpClientUtil.doGet(BAIDU_GEOCODING, param);
        //读取json数据，获得json对象
        jsonObject = JSONObject.parseObject(Userjson);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("用户地址解析失败");
        }
        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");//维度
        lng = location.getString("lng");//经度
        String userLngLat=lat+","+lng;//用户地址

        param.put("origin",shopLngLat);
        param.put("destination",userLngLat);
        param.put("steps_info","0");

        //路线规划
        String Routing = HttpClientUtil.doGet(BAIDU_ROUTING, param);
        jsonObject = JSONObject.parseObject(Routing);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }
        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance>5000){//超过五公里则不配送
            throw new OrderBusinessException("超出配送范围");
        }
    }

}
